813704 has 16 divisors (see below), whose sum is σ = 1567500. Its totient is φ = 395712.

The previous prime is 813697. The next prime is 813707. The reversal of 813704 is 407318.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 813604 + 100 = 902^2 + 10^2 .

It is a super-2 number, since 2×813704² = 1324228399232, which contains 22 as substring.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 813704.

It is not an unprimeable number, because it can be changed into a prime (813707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079 + ... + 1670.

2⁸¹³⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

813704 is a deficient number, since it is larger than the sum of its proper divisors (753796).

813704 is a wasteful number, since it uses less digits than its factorization.

813704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 813704 is about 902.0554306693. The cubic root of 813704 is about 93.3588478997.

The spelling of 813704 in words is "eight hundred thirteen thousand, seven hundred four".